202110121020 has 48 divisors (see below), whose sum is σ = 565929897120. Its totient is φ = 53893979136.

The previous prime is 202110121001. The next prime is 202110121061. The reversal of 202110121020 is 20121011202.

202110121020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 202110120987 and 202110121005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2162784 + ... + 2254296.

It is an arithmetic number, because the mean of its divisors is an integer number (11790206190).

Almost surely, 2^202110121020 is an apocalyptic number.

202110121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202110121020 is an abundant number, since it is smaller than the sum of its proper divisors (363819776100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202110121020 is a wasteful number, since it uses less digits than its factorization.

202110121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128334 (or 128332 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 202110121020 its reverse (20121011202), we get a palindrome (222231132222).

The spelling of 202110121020 in words is "two hundred two billion, one hundred ten million, one hundred twenty-one thousand, twenty".